What’s the overhead of a feature flag request?

February 21, 2019 13:02

Almost nothing. LaunchDarkly’s SDKs use a streaming connection to asynchronously receive updates to your feature flag rules. Your actual feature flag requests are served from memory (or a Redis store, if you configure one). This adds less than 1 millisecond of latency to your page loads— about as fast as looking up a value in a hash table.